Filter



Oct. 5, 1937.

F. A. HEADS-ON FILTER Original Filed Oct. 18, 1933 Fig-3.2

ATTORNEY R o W w. W

.FRANK A HEADSON Patented Oct. 5, 1937 UNITEDTSTATES FILTER.

Frank'A. Headson, Milwaukee, Wis.

Original application October 18, 1933, Serial No.

Divided and this application April 29, 1935, Serial No. 18,843

l 7 Claims. (Cl. 210-169) A p I from the shaft I24, and the longer end. of the The invention relates to filters suitable for oil reclaiming and other'uses, and has for an object'toprovide an effective filter capable of relatively free passage of liquid therethrough and permitting normal operation without need for placing the liquid under pressure;

Another object of theinvention is to provide a simple and durable means forcleaning the surface of a filter pad and for facilitating the entrance of the liquid into the pad.

The invention further consists in the several features hereinafter described and claimed.

One specific embodiment of the invention is illustrated in the accompanying drawing, where- Fig. -1 is a vertical sectional view of a filter constructed in accordance with the invention;

Fig. 2 is a sectional View taken on the line 2--2 of'Fig. 1; I

Fig.3 is a sectional view taken on the line 3-3 of Fig; 1, and

Fig. 4 is a perspective view of pad scrapers. t

In the drawing, 25 designates a suitable housing within .which is secured a horizontal receptacle-forming bracket or frame II4. A hori- Zontal shaft II5 is journalled in the bracket and is driven by any suitable source of power such as an electric motor, not shown, through a flexible coupling. I ll. The shaft 1 I5 carries a worm 'I I8 which meshes with a worm wheel l 59 carried on-a vertical shaft. I journalled in the bracket H4 and in a bearing plate I2I secured above the bracket. The vertical shaft I29 carries a pinion I22 which meshes with a gear I23 on a vertical shaft I24 journalled in the bracket and bearing plate. Below the bracket the shaft I24 has a downwardly projecting squared portion on which is slidably mounted against relative rotation a trough-forming arm I25 (Figs. 1 and 3) having an enlarged central portion which registers with an oil drain opening I26 in the bracket or frame.

Oil is admitted to the receptacle-forming bracket H4 in any suitable manner, as from the drain pipe or nozzle 9| of a still, not shown. The oil draining from the pipe 9| lubricates the gearing on the bracket and drains through the opening I26 into the rotary trough-forming arm I25 which turns at a slow speed. The arm I25 is divided into two basins by an angular transverse rib I25 at its hub portion, and the downward movement of the arm is limited by a pin I2I on the shaft I24. Drain openings I28 are formed near opposite ends of the arm at different radii one of the filter arm receives more oil than the shorter end.

:Oil drops from the rotary arm I25 onto a cushion-like filter pad I29 which preferably consists of a ribbon of cellulose cotton having a crepe surface and wound into a resilient, compressible, spongy, cylindrical block or diskabout a cardboard core I29, the axis of the block extending vertically. The pad is-supported in a cup-shaped holder I39 and rests on radial ribs I3I formed on the bottom wall of the-holder.

The bottom-wall of the holder is conical and con-.- verges downwardly to a central drain opening I32. Thecore I29 of the pad has fitted'therein asediment cup I33 to receive foreign matter. The cup rests on the notched inner endsxof the ribs I 3| and the top surface of the pad slopes downwardly to the upper edge of the cup which is marginally flanged. r

The bottom wall of the pad holder has downwardly projecting bosses I34 to which a pair of spaced parallel horizontal bars I35 are secured by screws I36. The bars are slidably guided in tracks I3'I mounted on the top wall of a tank I38 below the pad holder, so that the holder may be removed from the housing to replace the pad. The top wall of the tank' I38 has an opening I40 registering with the drain opening I32 in the pad holder I30 to receive the filtered oil, which is ready for use and is drawn from the tank at suitable intervals.

The upper surface of the filterpad I29 tends to become coated with a deposit which prevents free passage of the oil. This deposit is re-' moved by a plurality of scraper shoes MI and I42 which slidably bear on the upper surface of the pad, and are impelled by the rotary arm I25. The arm I25 carries a pair of parallel horizontal transversely extending pins I43 at opposite sides of its axis. Each pin pivotally carries a bell-crank I44 on the lower ends of which are .pins I45. An L-shaped connector I46 is pivotally mounted on each pin and has a depending leg carrying a cross pin I4I. Each scraper shoe is notched at its rear edge to receive the depending connector leg and is pivoted thereon by the cross pin I41. 7 At one side edge the scraper shoe is provided with spaced upstanding jaws I48 loosely receiving between them the laterally projecting leg of the connector I46 to limit the swinging movement of the scraper. On each scraper shoe I4I (Fig. 4) the jaws I48 are at one side edge, while on each scraper shoe I42 the jaws are at the other side edge. Each scraper shoe has a diagonal upstanding flange of the pad. 'lhe filterrrelnoves'paraffin and as foreign matter: toward the centralsediment cup I33; The bottom of each scraper shoe is arched, as'seen in Fig. 4, and each being discharged by'gra'vity throu'gh theiopening v f J26 and onto'the rotary troughforming arm I25.

' Irom' the arm l 2 5 the;'oil is ,distributed through V the drain openings 128' onto-the upper surface of the filter pad m m the paths, or the scraper shoes and seeps through the pad." The scraper; 7 shoes I and 2 scrape the deposit from the V suppersurfaceof'the pad, thejdeposit finding'its way: into the central sediment cup I33. The

"scrapers also,press;the resilient pad in their a In each passof a scraper shoe, thescraping edge travel, locally depressing the surfaceof the'; pad.

thereof efl'ects one compression of 5 the filter pad, andme heel .thereof eflfects a second compression phaltic; material *from-ith'e 5 011.? The; oil flows through the -fllter.*pad parallel ,tozt-he plies .and

the foreignjmatter -is' deposited mainly between 17116591195; j The filtered oil is; drainedtfrom thel' opening I 32 in ltheipad holder and enters the finished oil tankfllila -irom which it is drawn for use.

' ."I'heefllter pad requires periodic renewal, [the holder l3 fl' being' preferably removedfro mJthe housing, for this purpose; When removing' th'e' I holder, the'rotary' arm'isjslid up on -the shaft l24,as indicated by dotted lines in Fig, 1. The

a sediment cup l33 is removed fromtheidisca'rded" and placed'in the'newpadu 1 a d 'I'hispapplication constitutes a division of, in

application for'Oil reclaimers, SerialNo."694,047,

d What I claim as new and desirej'to secure by LettersPatent is: v .i r a V liThe. combination'of a cushion-like filter pad of resilient, compressible; spongy material for receiving liquid thereon, and av pad-pressing and 2, The combination of a resilie -edge bearing on the padz' a r Thecombination'of a resilient;.fi1ter pad for a I action onfthe liquid entering the pad. i 5. In1combination, a filter element-,ya, shoe, v atively movable with respect tosaidfilter element scraping shoe relatively movable alo ng the sur-l face-of the pad for facilitating the absorption of" I liquid bythe pad through the compression and recovery of the pad, said compression and recovd ery of the pad causing apumping action'onjthe' liquid entering the pad.

for receiving liquid thereon; and a relatively inov-f ablepad-engaging scraper shoe'supporte'd'by said e i pa d for cleaning thesurface of thepad, said im scraper having a forwardly projecting scraping receiving liquid -on its upper surface; and'a relatively' movable shoe bearing on said surface and supportedby said surface, said shoe having a leading pad-engaging scraping edge and a 'trail-, a ingfpad engaging-heel and having an elevated bottom betjween said scraping edge and-heel;

, 4., Inbombination, a cushion-like filter pedaresilient, compressible, spongy material, and pad-'- i pressing and l scraping means relatively movable pressionand recovery of the pad, said compres along 'thesurface of said pad forfa cilitating the r 7 absorption of liquid'by the pad through the com Q r sion and recoveryof the pad effecting a pumping and bearing on, said filter element, and means, for: pressing said shoe against said =filter element and having a pivotal connection with said shoe 1 to substantially-equalize the bearing of opposite" of 7 said pivotal connectionjv extending substan-; tially in the .directionotfmovement and at-an intermediate portion of-i said shoe; 7

' 6. The combination are fllterelement for re sides of said shoe on said fllterelement, the axis ceiving-liquid on its upper surface, a membera'c i-ftatable above said element abouta substantially vertical axis, means forirotating said member, an.

equalizing lever pivotally secured to said rotatable 'member, and shoes 'pivotally connected to said equalizing lever andmovable on said surface. 7. In combination, a filter pad, an impelling member above said padrotatable about a substantiallyvertical axis and forming a liquid-car:

'rying distributor, and 1a, pad-pressing scraper rev;

olubly impelled by said member along the surface of said pad, said rotatable member'having an outlet for discharging liquid onto said pad in the path of said scraper.

V FRANKAVHEVADSONQJ' 

